buildd log scanner tag W-shlibs-maybe-plugin
The build logs contains a like like
dpkg-shlibdeps: warning: BINARY contains an unresolvable reference to symbol SYMBOL: it's probably a plugin
- You have a shared plugin file with a soname and unresolved symbols.
Unresolved symbols might be caused by not being linked to some library directly or by using symbols of the library.
But in either case a plugin should not have a soname (and without a soname dpkg-shlibdeps does not give this warning)
- You have a library in a non-standard directory with missing symbols.
Refer to the discussion in I-shlibs-useless-link.